#include <stdio.h>

int main() {
	int a = 100, x = 10, y = 20, c = 5, d = 0;
	if (x < y)
		if (y != 10)
			if (!c)
				a = 1;
			else if (d)
				a = 10;
	a = -1;
	printf("%d\n", a);
	return 0;
}